APA引文

Karpagam,M. (1991). Environmental economics: A text book. Sterling Publishers Pvt. Ltd.

Chicago Edition Citation

Karpagam,M. Environmental Economics: A Text Book. New Delhi: Sterling Publishers Pvt. Ltd, 1991.

MLA引文

Karpagam,M. Environmental Economics: A Text Book. Sterling Publishers Pvt. Ltd, 1991.

警告：這些引文格式不一定是100％准確.